面向5G的承载网需求及关键技术

[摘要] 认为5G传输承载网是支撑5G业务的基础。针对新的业务需求，提出了低成本城域波分、高精度同步、低时延传送技术、FlexE切片技术以及软件定义网络（SDN）控制等新技术，以应对5G对传输承载网的传输能力、设备性能,以及智能管控的挑战，从而满足移动互联网、物联网等多种应用场景的需求。

[关键词] 传输网；5G网络；同步；SDN；网络切片

[Abstract] 5G transmission bearing network is the base of 5G services. According to the new service demands, several key technologies are proposed in this paper, such as metro wavelength division multiplexing (WDM) with lost cost, high-definition synchronization, transport technology with low latency, network slicing with Flex-E and soft-defined network (SDN) technology. With these technologies, the challenges of 5G in transport ability, equipment performance and intelligent control can be well addressed, and the variable scenarios of mobile internet and Internet of things (IoT) can be realized.

[Keywords] transmission network; 5G network; synchronization; SDN; network slicing